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Food Res Int

Title:		"(1)H NMR and SPME-GC/MS study of hydrolysis, oxidation and other reactions occurring during in vitro digestion of non-oxidized and oxidized sunflower oil. Formation of hydroxy-octadecadienoates"
Author(s):		Nieva-Echevarria B; Goicoechea E; Manzanos MJ; Guillen MD;
Address:		"Food Technology, Faculty of Pharmacy, Lascaray Research Center, University of the Basque Country (UPV/EHU). Paseo de la Universidad N degrees 7, 01006 Vitoria, Spain. Food Technology, Faculty of Pharmacy, Lascaray Research Center, University of the Basque Country (UPV/EHU). Paseo de la Universidad N degrees 7, 01006 Vitoria, Spain. Electronic address: mariadolores.guillen@ehu.eus"
Journal Title:		Food Res Int
Year:		2017
Volume:		20161205
Issue:
Page Number:		171 - 182
DOI:		10.1016/j.foodres.2016.11.027
ISSN/ISBN:		1873-7145 (Electronic) 0963-9969 (Linking)
Abstract:		"Both fresh and slightly oxidized sunflower oils, as models of omega-6 rich lipids, were submitted to in vitro gastrointestinal digestion and studied by (1)H NMR and SPME-GC/MS. Changes in lipolysis degree, lipid composition and oxidative level were studied by (1)H NMR. Three quantitative approaches were used and several equations were newly developed. In oxidized oil digestates slightly lower hydrolysis and a higher advance of oxidation took place during digestion. This latter was evidenced by a greater decrease of lipid unsaturation degree and enhanced generation of oxidation products (cis,trans-hydroperoxy-octadecadienoates, cis,trans- and trans,trans-hydroxy-octadecadienoates). For the first time, the generation of hydroxy-octadecadienoates during in vitro digestion is reported. Furthermore, SPME-GC/MS study of non-digested and digested samples headspaces confirmed that lipid oxidation occurred: abundances of volatile markers increased (including potentially toxic alpha,beta-unsaturated aldehydes), especially in oxidized oils digestates. Markers of Maillard-type and esterification reactions were also detected in the digestates"
Keywords:		"*Digestion Esterification *Gas Chromatography-Mass Spectrometry Glycation End Products, Advanced/chemistry Hydrolysis *Lipolysis Maillard Reaction Oxidation-Reduction *Proton Magnetic Resonance Spectroscopy *Solid Phase Microextraction Sunflower Oil/*chem;"
Notes:		"MedlineNieva-Echevarria, Barbara Goicoechea, Encarnacion Manzanos, Maria J Guillen, Maria D eng Research Support, Non-U.S. Gov't Canada 2017/03/16 Food Res Int. 2017 Jan; 91:171-182. doi: 10.1016/j.foodres.2016.11.027. Epub 2016 Dec 5"